2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "krb5_locl.h"
35 RCSID("$Id: crypto.c,v 1.132 2006/02/28 14:52:57 lha Exp $");
39 static void krb5_crypto_debug(krb5_context, int, size_t, krb5_keyblock*);
53 struct krb5_crypto_data {
54 struct encryption_type *et;
57 struct key_usage *key_usage;
61 #define kcrypto_oid_enc(n) { sizeof(n)/sizeof(n[0]), n }
63 #define CRYPTO_ETYPE(C) ((C)->et->type)
65 /* bits for `flags' below */
66 #define F_KEYED 1 /* checksum is keyed */
67 #define F_CPROOF 2 /* checksum is collision proof */
68 #define F_DERIVED 4 /* uses derived keys */
69 #define F_VARIANT 8 /* uses `variant' keys (6.4.3) */
70 #define F_PSEUDO 16 /* not a real protocol type */
71 #define F_SPECIAL 32 /* backwards */
72 #define F_DISABLED 64 /* enctype/checksum disabled */
73 #define F_PADCMS 128 /* padding done like in CMS */
78 krb5_error_code (*string_to_key)(krb5_context, krb5_enctype, krb5_data,
79 krb5_salt, krb5_data, krb5_keyblock*);
83 krb5_keytype type; /* XXX */
90 krb5_enctype best_etype;
92 void (*random_key)(krb5_context, krb5_keyblock*);
93 void (*schedule)(krb5_context, struct key_data *, const void *);
94 struct salt_type *string_to_key;
95 void (*random_to_key)(krb5_context, krb5_keyblock*, const void*, size_t);
96 krb5_error_code (*get_params)(krb5_context, const krb5_data *,
97 void **, krb5_data *);
98 krb5_error_code (*set_params)(krb5_context, const void *,
99 const krb5_data *, krb5_data *);
102 struct checksum_type {
108 void (*checksum)(krb5_context context,
109 struct key_data *key,
110 const void *buf, size_t len,
113 krb5_error_code (*verify)(krb5_context context,
114 struct key_data *key,
115 const void *buf, size_t len,
120 struct encryption_type {
126 size_t confoundersize;
127 struct key_type *keytype;
128 struct checksum_type *checksum;
129 struct checksum_type *keyed_checksum;
131 krb5_error_code (*encrypt)(krb5_context context,
132 struct key_data *key,
133 void *data, size_t len,
134 krb5_boolean encryptp,
139 #define ENCRYPTION_USAGE(U) (((U) << 8) | 0xAA)
140 #define INTEGRITY_USAGE(U) (((U) << 8) | 0x55)
141 #define CHECKSUM_USAGE(U) (((U) << 8) | 0x99)
143 static struct checksum_type *_find_checksum(krb5_cksumtype type);
144 static struct encryption_type *_find_enctype(krb5_enctype type);
145 static struct key_type *_find_keytype(krb5_keytype type);
146 static krb5_error_code _get_derived_key(krb5_context, krb5_crypto,
147 unsigned, struct key_data**);
148 static struct key_data *_new_derived_key(krb5_crypto crypto, unsigned usage);
149 static krb5_error_code derive_key(krb5_context context,
150 struct encryption_type *et,
151 struct key_data *key,
152 const void *constant,
154 static krb5_error_code hmac(krb5_context context,
155 struct checksum_type *cm,
159 struct key_data *keyblock,
161 static void free_key_data(krb5_context context, struct key_data *key);
162 static krb5_error_code usage2arcfour (krb5_context, unsigned *);
163 static void xor (DES_cblock *, const unsigned char *);
165 /************************************************************
167 ************************************************************/
169 static HEIMDAL_MUTEX crypto_mutex = HEIMDAL_MUTEX_INITIALIZER;
173 krb5_DES_random_key(krb5_context context,
176 DES_cblock *k = key->keyvalue.data;
178 krb5_generate_random_block(k, sizeof(DES_cblock));
179 DES_set_odd_parity(k);
180 } while(DES_is_weak_key(k));
184 krb5_DES_schedule(krb5_context context,
185 struct key_data *key,
188 DES_set_key(key->key->keyvalue.data, key->schedule->data);
191 #ifdef ENABLE_AFS_STRING_TO_KEY
193 /* This defines the Andrew string_to_key function. It accepts a password
194 * string as input and converts its via a one-way encryption algorithm to a DES
195 * encryption key. It is compatible with the original Andrew authentication
196 * service password database.
200 * Short passwords, i.e 8 characters or less.
203 krb5_DES_AFS3_CMU_string_to_key (krb5_data pw,
207 char password[8+1]; /* crypt is limited to 8 chars anyway */
210 for(i = 0; i < 8; i++) {
211 char c = ((i < pw.length) ? ((char*)pw.data)[i] : 0) ^
213 tolower(((unsigned char*)cell.data)[i]) : 0);
214 password[i] = c ? c : 'X';
218 memcpy(key, crypt(password, "p1") + 2, sizeof(DES_cblock));
220 /* parity is inserted into the LSB so left shift each byte up one
221 bit. This allows ascii characters with a zero MSB to retain as
222 much significance as possible. */
223 for (i = 0; i < sizeof(DES_cblock); i++)
224 ((unsigned char*)key)[i] <<= 1;
225 DES_set_odd_parity (key);
229 * Long passwords, i.e 9 characters or more.
232 krb5_DES_AFS3_Transarc_string_to_key (krb5_data pw,
236 DES_key_schedule schedule;
242 memcpy(password, pw.data, min(pw.length, sizeof(password)));
243 if(pw.length < sizeof(password)) {
244 int len = min(cell.length, sizeof(password) - pw.length);
247 memcpy(password + pw.length, cell.data, len);
248 for (i = pw.length; i < pw.length + len; ++i)
249 password[i] = tolower((unsigned char)password[i]);
251 passlen = min(sizeof(password), pw.length + cell.length);
252 memcpy(&ivec, "kerberos", 8);
253 memcpy(&temp_key, "kerberos", 8);
254 DES_set_odd_parity (&temp_key);
255 DES_set_key (&temp_key, &schedule);
256 DES_cbc_cksum ((void*)password, &ivec, passlen, &schedule, &ivec);
258 memcpy(&temp_key, &ivec, 8);
259 DES_set_odd_parity (&temp_key);
260 DES_set_key (&temp_key, &schedule);
261 DES_cbc_cksum ((void*)password, key, passlen, &schedule, &ivec);
262 memset(&schedule, 0, sizeof(schedule));
263 memset(&temp_key, 0, sizeof(temp_key));
264 memset(&ivec, 0, sizeof(ivec));
265 memset(password, 0, sizeof(password));
267 DES_set_odd_parity (key);
270 static krb5_error_code
271 DES_AFS3_string_to_key(krb5_context context,
272 krb5_enctype enctype,
279 if(password.length > 8)
280 krb5_DES_AFS3_Transarc_string_to_key(password, salt.saltvalue, &tmp);
282 krb5_DES_AFS3_CMU_string_to_key(password, salt.saltvalue, &tmp);
283 key->keytype = enctype;
284 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
285 memset(&key, 0, sizeof(key));
288 #endif /* ENABLE_AFS_STRING_TO_KEY */
291 DES_string_to_key_int(unsigned char *data, size_t length, DES_cblock *key)
293 DES_key_schedule schedule;
298 unsigned char swap[] = { 0x0, 0x8, 0x4, 0xc, 0x2, 0xa, 0x6, 0xe,
299 0x1, 0x9, 0x5, 0xd, 0x3, 0xb, 0x7, 0xf };
302 p = (unsigned char*)key;
303 for (i = 0; i < length; i++) {
304 unsigned char tmp = data[i];
308 *--p ^= (swap[tmp & 0xf] << 4) | swap[(tmp & 0xf0) >> 4];
312 DES_set_odd_parity(key);
313 if(DES_is_weak_key(key))
315 DES_set_key(key, &schedule);
316 DES_cbc_cksum((void*)data, key, length, &schedule, key);
317 memset(&schedule, 0, sizeof(schedule));
318 DES_set_odd_parity(key);
319 if(DES_is_weak_key(key))
323 static krb5_error_code
324 krb5_DES_string_to_key(krb5_context context,
325 krb5_enctype enctype,
335 #ifdef ENABLE_AFS_STRING_TO_KEY
336 if (opaque.length == 1) {
338 _krb5_get_int(opaque.data, &v, 1);
340 return DES_AFS3_string_to_key(context, enctype, password,
345 len = password.length + salt.saltvalue.length;
347 if(len > 0 && s == NULL) {
348 krb5_set_error_string(context, "malloc: out of memory");
351 memcpy(s, password.data, password.length);
352 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
353 DES_string_to_key_int(s, len, &tmp);
354 key->keytype = enctype;
355 krb5_data_copy(&key->keyvalue, tmp, sizeof(tmp));
356 memset(&tmp, 0, sizeof(tmp));
363 krb5_DES_random_to_key(krb5_context context,
368 DES_cblock *k = key->keyvalue.data;
369 memcpy(k, data, key->keyvalue.length);
370 DES_set_odd_parity(k);
371 if(DES_is_weak_key(k))
372 xor(k, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
380 DES3_random_key(krb5_context context,
383 DES_cblock *k = key->keyvalue.data;
385 krb5_generate_random_block(k, 3 * sizeof(DES_cblock));
386 DES_set_odd_parity(&k[0]);
387 DES_set_odd_parity(&k[1]);
388 DES_set_odd_parity(&k[2]);
389 } while(DES_is_weak_key(&k[0]) ||
390 DES_is_weak_key(&k[1]) ||
391 DES_is_weak_key(&k[2]));
395 DES3_schedule(krb5_context context,
396 struct key_data *key,
399 DES_cblock *k = key->key->keyvalue.data;
400 DES_key_schedule *s = key->schedule->data;
401 DES_set_key(&k[0], &s[0]);
402 DES_set_key(&k[1], &s[1]);
403 DES_set_key(&k[2], &s[2]);
407 * A = A xor B. A & B are 8 bytes.
411 xor (DES_cblock *key, const unsigned char *b)
413 unsigned char *a = (unsigned char*)key;
424 static krb5_error_code
425 DES3_string_to_key(krb5_context context,
426 krb5_enctype enctype,
434 unsigned char tmp[24];
437 len = password.length + salt.saltvalue.length;
439 if(len != 0 && str == NULL) {
440 krb5_set_error_string(context, "malloc: out of memory");
443 memcpy(str, password.data, password.length);
444 memcpy(str + password.length, salt.saltvalue.data, salt.saltvalue.length);
447 DES_key_schedule s[3];
450 _krb5_n_fold(str, len, tmp, 24);
452 for(i = 0; i < 3; i++){
453 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
454 DES_set_odd_parity(keys + i);
455 if(DES_is_weak_key(keys + i))
456 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
457 DES_set_key(keys + i, &s[i]);
459 memset(&ivec, 0, sizeof(ivec));
460 DES_ede3_cbc_encrypt(tmp,
462 &s[0], &s[1], &s[2], &ivec, DES_ENCRYPT);
463 memset(s, 0, sizeof(s));
464 memset(&ivec, 0, sizeof(ivec));
465 for(i = 0; i < 3; i++){
466 memcpy(keys + i, tmp + i * 8, sizeof(keys[i]));
467 DES_set_odd_parity(keys + i);
468 if(DES_is_weak_key(keys + i))
469 xor(keys + i, (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
471 memset(tmp, 0, sizeof(tmp));
473 key->keytype = enctype;
474 krb5_data_copy(&key->keyvalue, keys, sizeof(keys));
475 memset(keys, 0, sizeof(keys));
481 static krb5_error_code
482 DES3_string_to_key_derived(krb5_context context,
483 krb5_enctype enctype,
490 size_t len = password.length + salt.saltvalue.length;
494 if(len != 0 && s == NULL) {
495 krb5_set_error_string(context, "malloc: out of memory");
498 memcpy(s, password.data, password.length);
499 memcpy(s + password.length, salt.saltvalue.data, salt.saltvalue.length);
500 ret = krb5_string_to_key_derived(context,
511 DES3_random_to_key(krb5_context context,
516 unsigned char *x = key->keyvalue.data;
517 const u_char *q = data;
521 memset(x, 0, sizeof(x));
522 for (i = 0; i < 3; ++i) {
524 for (j = 0; j < 7; ++j) {
525 unsigned char b = q[7 * i + j];
530 for (j = 6; j >= 0; --j) {
531 foo |= q[7 * i + j] & 1;
536 k = key->keyvalue.data;
537 for (i = 0; i < 3; i++) {
538 DES_set_odd_parity(&k[i]);
539 if(DES_is_weak_key(&k[i]))
540 xor(&k[i], (const unsigned char*)"\0\0\0\0\0\0\0\xf0");
549 ARCFOUR_schedule(krb5_context context,
553 RC4_set_key (kd->schedule->data,
554 kd->key->keyvalue.length, kd->key->keyvalue.data);
557 static krb5_error_code
558 ARCFOUR_string_to_key(krb5_context context,
559 krb5_enctype enctype,
570 len = 2 * password.length;
572 if (len != 0 && s == NULL) {
573 krb5_set_error_string(context, "malloc: out of memory");
576 for (p = s, i = 0; i < password.length; ++i) {
577 *p++ = ((char *)password.data)[i];
581 MD4_Update (&m, s, len);
582 key->keytype = enctype;
583 krb5_data_alloc (&key->keyvalue, 16);
584 MD4_Final (key->keyvalue.data, &m);
594 int _krb5_AES_string_to_default_iterator = 4096;
596 static krb5_error_code
597 AES_string_to_key(krb5_context context,
598 krb5_enctype enctype,
606 struct encryption_type *et;
609 if (opaque.length == 0)
610 iter = _krb5_AES_string_to_default_iterator;
611 else if (opaque.length == 4) {
613 _krb5_get_int(opaque.data, &v, 4);
614 iter = ((u_int32_t)v);
616 return KRB5_PROG_KEYTYPE_NOSUPP; /* XXX */
618 et = _find_enctype(enctype);
620 return KRB5_PROG_KEYTYPE_NOSUPP;
622 key->keytype = enctype;
623 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
625 krb5_set_error_string(context, "Failed to allocate pkcs5 key");
628 ret = krb5_copy_keyblock(context, key, &kd.key);
630 krb5_free_keyblock(context, key);
634 ret = PKCS5_PBKDF2_HMAC_SHA1(password.data, password.length,
635 salt.saltvalue.data, salt.saltvalue.length,
637 et->keytype->size, kd.key->keyvalue.data);
640 krb5_set_error_string(context, "Error calculating s2k");
641 return KRB5_PROG_KEYTYPE_NOSUPP;
644 ret = derive_key(context, et, &kd, "kerberos", strlen("kerberos"));
646 ret = krb5_copy_keyblock_contents(context, kd.key, key);
647 free_key_data(context, &kd);
652 struct krb5_aes_schedule {
658 AES_schedule(krb5_context context,
662 struct krb5_aes_schedule *key = kd->schedule->data;
663 int bits = kd->key->keyvalue.length * 8;
665 memset(key, 0, sizeof(*key));
666 AES_set_encrypt_key(kd->key->keyvalue.data, bits, &key->ekey);
667 AES_set_decrypt_key(kd->key->keyvalue.data, bits, &key->dkey);
675 int maximum_effective_key;
678 static krb5_error_code
679 rc2_get_params(krb5_context context,
680 const krb5_data *data,
684 RC2CBCParameter rc2params;
685 struct _RC2_params *p;
689 ret = decode_RC2CBCParameter(data->data, data->length, &rc2params, &size);
691 krb5_set_error_string(context, "Can't decode RC2 parameters");
694 p = malloc(sizeof(*p));
696 free_RC2CBCParameter(&rc2params);
697 krb5_set_error_string(context, "malloc - out of memory");
701 switch(rc2params.rc2ParameterVersion) {
703 p->maximum_effective_key = 40;
706 p->maximum_effective_key = 64;
709 p->maximum_effective_key = 128;
714 ret = copy_octet_string(&rc2params.iv, ivec);
715 free_RC2CBCParameter(&rc2params);
721 static krb5_error_code
722 rc2_set_params(krb5_context context,
724 const krb5_data *ivec,
727 RC2CBCParameter rc2params;
728 const struct _RC2_params *p = params;
729 int maximum_effective_key = 128;
733 memset(&rc2params, 0, sizeof(rc2params));
736 maximum_effective_key = p->maximum_effective_key;
739 switch(maximum_effective_key) {
741 rc2params.rc2ParameterVersion = 160;
744 rc2params.rc2ParameterVersion = 120;
747 rc2params.rc2ParameterVersion = 58;
750 ret = copy_octet_string(ivec, &rc2params.iv);
754 ASN1_MALLOC_ENCODE(RC2CBCParameter, data->data, data->length,
755 &rc2params, &size, ret);
756 if (ret == 0 && size != data->length)
757 krb5_abortx(context, "Internal asn1 encoder failure");
758 free_RC2CBCParameter(&rc2params);
764 rc2_schedule(krb5_context context,
768 const struct _RC2_params *p = params;
769 int maximum_effective_key = 128;
771 maximum_effective_key = p->maximum_effective_key;
772 RC2_set_key (kd->schedule->data,
773 kd->key->keyvalue.length,
774 kd->key->keyvalue.data,
775 maximum_effective_key);
783 static struct salt_type des_salt[] = {
787 krb5_DES_string_to_key
789 #ifdef ENABLE_AFS_STRING_TO_KEY
793 DES_AFS3_string_to_key
799 static struct salt_type des3_salt[] = {
808 static struct salt_type des3_salt_derived[] = {
812 DES3_string_to_key_derived
817 static struct salt_type AES_salt[] = {
826 static struct salt_type arcfour_salt[] = {
830 ARCFOUR_string_to_key
839 static struct key_type keytype_null = {
851 static struct key_type keytype_des = {
857 sizeof(DES_key_schedule),
861 krb5_DES_random_to_key
864 static struct key_type keytype_des3 = {
868 3 * sizeof(DES_cblock),
869 3 * sizeof(DES_cblock),
870 3 * sizeof(DES_key_schedule),
877 static struct key_type keytype_des3_derived = {
881 3 * sizeof(DES_cblock),
882 3 * sizeof(DES_cblock),
883 3 * sizeof(DES_key_schedule),
890 static struct key_type keytype_aes128 = {
896 sizeof(struct krb5_aes_schedule),
902 static struct key_type keytype_aes192 = {
908 sizeof(struct krb5_aes_schedule),
914 static struct key_type keytype_aes256 = {
920 sizeof(struct krb5_aes_schedule),
926 static struct key_type keytype_arcfour = {
938 static struct key_type keytype_rc2 = {
953 static struct key_type *keytypes[] = {
956 &keytype_des3_derived,
965 static int num_keytypes = sizeof(keytypes) / sizeof(keytypes[0]);
967 static struct key_type *
968 _find_keytype(krb5_keytype type)
971 for(i = 0; i < num_keytypes; i++)
972 if(keytypes[i]->type == type)
978 krb5_error_code KRB5_LIB_FUNCTION
979 krb5_salttype_to_string (krb5_context context,
984 struct encryption_type *e;
985 struct salt_type *st;
987 e = _find_enctype (etype);
989 krb5_set_error_string(context, "encryption type %d not supported",
991 return KRB5_PROG_ETYPE_NOSUPP;
993 for (st = e->keytype->string_to_key; st && st->type; st++) {
994 if (st->type == stype) {
995 *string = strdup (st->name);
996 if (*string == NULL) {
997 krb5_set_error_string(context, "malloc: out of memory");
1003 krb5_set_error_string(context, "salttype %d not supported", stype);
1004 return HEIM_ERR_SALTTYPE_NOSUPP;
1007 krb5_error_code KRB5_LIB_FUNCTION
1008 krb5_string_to_salttype (krb5_context context,
1011 krb5_salttype *salttype)
1013 struct encryption_type *e;
1014 struct salt_type *st;
1016 e = _find_enctype (etype);
1018 krb5_set_error_string(context, "encryption type %d not supported",
1020 return KRB5_PROG_ETYPE_NOSUPP;
1022 for (st = e->keytype->string_to_key; st && st->type; st++) {
1023 if (strcasecmp (st->name, string) == 0) {
1024 *salttype = st->type;
1028 krb5_set_error_string(context, "salttype %s not supported", string);
1029 return HEIM_ERR_SALTTYPE_NOSUPP;
1032 krb5_error_code KRB5_LIB_FUNCTION
1033 krb5_get_pw_salt(krb5_context context,
1034 krb5_const_principal principal,
1039 krb5_error_code ret;
1042 salt->salttype = KRB5_PW_SALT;
1043 len = strlen(principal->realm);
1044 for (i = 0; i < principal->name.name_string.len; ++i)
1045 len += strlen(principal->name.name_string.val[i]);
1046 ret = krb5_data_alloc (&salt->saltvalue, len);
1049 p = salt->saltvalue.data;
1050 memcpy (p, principal->realm, strlen(principal->realm));
1051 p += strlen(principal->realm);
1052 for (i = 0; i < principal->name.name_string.len; ++i) {
1054 principal->name.name_string.val[i],
1055 strlen(principal->name.name_string.val[i]));
1056 p += strlen(principal->name.name_string.val[i]);
1061 krb5_error_code KRB5_LIB_FUNCTION
1062 krb5_free_salt(krb5_context context,
1065 krb5_data_free(&salt.saltvalue);
1069 krb5_error_code KRB5_LIB_FUNCTION
1070 krb5_string_to_key_data (krb5_context context,
1071 krb5_enctype enctype,
1073 krb5_principal principal,
1076 krb5_error_code ret;
1079 ret = krb5_get_pw_salt(context, principal, &salt);
1082 ret = krb5_string_to_key_data_salt(context, enctype, password, salt, key);
1083 krb5_free_salt(context, salt);
1087 krb5_error_code KRB5_LIB_FUNCTION
1088 krb5_string_to_key (krb5_context context,
1089 krb5_enctype enctype,
1090 const char *password,
1091 krb5_principal principal,
1095 pw.data = rk_UNCONST(password);
1096 pw.length = strlen(password);
1097 return krb5_string_to_key_data(context, enctype, pw, principal, key);
1100 krb5_error_code KRB5_LIB_FUNCTION
1101 krb5_string_to_key_data_salt (krb5_context context,
1102 krb5_enctype enctype,
1108 krb5_data_zero(&opaque);
1109 return krb5_string_to_key_data_salt_opaque(context, enctype, password,
1114 * Do a string -> key for encryption type `enctype' operation on
1115 * `password' (with salt `salt' and the enctype specific data string
1116 * `opaque'), returning the resulting key in `key'
1119 krb5_error_code KRB5_LIB_FUNCTION
1120 krb5_string_to_key_data_salt_opaque (krb5_context context,
1121 krb5_enctype enctype,
1127 struct encryption_type *et =_find_enctype(enctype);
1128 struct salt_type *st;
1130 krb5_set_error_string(context, "encryption type %d not supported",
1132 return KRB5_PROG_ETYPE_NOSUPP;
1134 for(st = et->keytype->string_to_key; st && st->type; st++)
1135 if(st->type == salt.salttype)
1136 return (*st->string_to_key)(context, enctype, password,
1138 krb5_set_error_string(context, "salt type %d not supported",
1140 return HEIM_ERR_SALTTYPE_NOSUPP;
1144 * Do a string -> key for encryption type `enctype' operation on the
1145 * string `password' (with salt `salt'), returning the resulting key
1149 krb5_error_code KRB5_LIB_FUNCTION
1150 krb5_string_to_key_salt (krb5_context context,
1151 krb5_enctype enctype,
1152 const char *password,
1157 pw.data = rk_UNCONST(password);
1158 pw.length = strlen(password);
1159 return krb5_string_to_key_data_salt(context, enctype, pw, salt, key);
1162 krb5_error_code KRB5_LIB_FUNCTION
1163 krb5_string_to_key_salt_opaque (krb5_context context,
1164 krb5_enctype enctype,
1165 const char *password,
1171 pw.data = rk_UNCONST(password);
1172 pw.length = strlen(password);
1173 return krb5_string_to_key_data_salt_opaque(context, enctype,
1174 pw, salt, opaque, key);
1177 krb5_error_code KRB5_LIB_FUNCTION
1178 krb5_keytype_to_string(krb5_context context,
1179 krb5_keytype keytype,
1182 struct key_type *kt = _find_keytype(keytype);
1184 krb5_set_error_string(context, "key type %d not supported", keytype);
1185 return KRB5_PROG_KEYTYPE_NOSUPP;
1187 *string = strdup(kt->name);
1188 if(*string == NULL) {
1189 krb5_set_error_string(context, "malloc: out of memory");
1195 krb5_error_code KRB5_LIB_FUNCTION
1196 krb5_string_to_keytype(krb5_context context,
1198 krb5_keytype *keytype)
1201 for(i = 0; i < num_keytypes; i++)
1202 if(strcasecmp(keytypes[i]->name, string) == 0){
1203 *keytype = keytypes[i]->type;
1206 krb5_set_error_string(context, "key type %s not supported", string);
1207 return KRB5_PROG_KEYTYPE_NOSUPP;
1210 krb5_error_code KRB5_LIB_FUNCTION
1211 krb5_enctype_keysize(krb5_context context,
1215 struct encryption_type *et = _find_enctype(type);
1217 krb5_set_error_string(context, "encryption type %d not supported",
1219 return KRB5_PROG_ETYPE_NOSUPP;
1221 *keysize = et->keytype->size;
1225 krb5_error_code KRB5_LIB_FUNCTION
1226 krb5_generate_random_keyblock(krb5_context context,
1230 krb5_error_code ret;
1231 struct encryption_type *et = _find_enctype(type);
1233 krb5_set_error_string(context, "encryption type %d not supported",
1235 return KRB5_PROG_ETYPE_NOSUPP;
1237 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
1240 key->keytype = type;
1241 if(et->keytype->random_key)
1242 (*et->keytype->random_key)(context, key);
1244 krb5_generate_random_block(key->keyvalue.data,
1245 key->keyvalue.length);
1249 static krb5_error_code
1250 _key_schedule(krb5_context context,
1251 struct key_data *key,
1254 krb5_error_code ret;
1255 struct encryption_type *et = _find_enctype(key->key->keytype);
1256 struct key_type *kt = et->keytype;
1258 if(kt->schedule == NULL)
1260 if (key->schedule != NULL)
1262 ALLOC(key->schedule, 1);
1263 if(key->schedule == NULL) {
1264 krb5_set_error_string(context, "malloc: out of memory");
1267 ret = krb5_data_alloc(key->schedule, kt->schedule_size);
1269 free(key->schedule);
1270 key->schedule = NULL;
1273 (*kt->schedule)(context, key, params);
1277 /************************************************************
1279 ************************************************************/
1282 NONE_checksum(krb5_context context,
1283 struct key_data *key,
1292 CRC32_checksum(krb5_context context,
1293 struct key_data *key,
1300 unsigned char *r = C->checksum.data;
1301 _krb5_crc_init_table ();
1302 crc = _krb5_crc_update (data, len, 0);
1304 r[1] = (crc >> 8) & 0xff;
1305 r[2] = (crc >> 16) & 0xff;
1306 r[3] = (crc >> 24) & 0xff;
1310 RSA_MD4_checksum(krb5_context context,
1311 struct key_data *key,
1320 MD4_Update (&m, data, len);
1321 MD4_Final (C->checksum.data, &m);
1325 RSA_MD4_DES_checksum(krb5_context context,
1326 struct key_data *key,
1334 unsigned char *p = cksum->checksum.data;
1336 krb5_generate_random_block(p, 8);
1338 MD4_Update (&md4, p, 8);
1339 MD4_Update (&md4, data, len);
1340 MD4_Final (p + 8, &md4);
1341 memset (&ivec, 0, sizeof(ivec));
1345 key->schedule->data,
1350 static krb5_error_code
1351 RSA_MD4_DES_verify(krb5_context context,
1352 struct key_data *key,
1359 unsigned char tmp[24];
1360 unsigned char res[16];
1362 krb5_error_code ret = 0;
1364 memset(&ivec, 0, sizeof(ivec));
1365 DES_cbc_encrypt(C->checksum.data,
1368 key->schedule->data,
1372 MD4_Update (&md4, tmp, 8); /* confounder */
1373 MD4_Update (&md4, data, len);
1374 MD4_Final (res, &md4);
1375 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1376 krb5_clear_error_string (context);
1377 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1379 memset(tmp, 0, sizeof(tmp));
1380 memset(res, 0, sizeof(res));
1385 RSA_MD5_checksum(krb5_context context,
1386 struct key_data *key,
1395 MD5_Update(&m, data, len);
1396 MD5_Final (C->checksum.data, &m);
1400 RSA_MD5_DES_checksum(krb5_context context,
1401 struct key_data *key,
1409 unsigned char *p = C->checksum.data;
1411 krb5_generate_random_block(p, 8);
1413 MD5_Update (&md5, p, 8);
1414 MD5_Update (&md5, data, len);
1415 MD5_Final (p + 8, &md5);
1416 memset (&ivec, 0, sizeof(ivec));
1420 key->schedule->data,
1425 static krb5_error_code
1426 RSA_MD5_DES_verify(krb5_context context,
1427 struct key_data *key,
1434 unsigned char tmp[24];
1435 unsigned char res[16];
1437 DES_key_schedule *sched = key->schedule->data;
1438 krb5_error_code ret = 0;
1440 memset(&ivec, 0, sizeof(ivec));
1441 DES_cbc_encrypt(C->checksum.data,
1448 MD5_Update (&md5, tmp, 8); /* confounder */
1449 MD5_Update (&md5, data, len);
1450 MD5_Final (res, &md5);
1451 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1452 krb5_clear_error_string (context);
1453 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1455 memset(tmp, 0, sizeof(tmp));
1456 memset(res, 0, sizeof(res));
1461 RSA_MD5_DES3_checksum(krb5_context context,
1462 struct key_data *key,
1470 unsigned char *p = C->checksum.data;
1471 DES_key_schedule *sched = key->schedule->data;
1473 krb5_generate_random_block(p, 8);
1475 MD5_Update (&md5, p, 8);
1476 MD5_Update (&md5, data, len);
1477 MD5_Final (p + 8, &md5);
1478 memset (&ivec, 0, sizeof(ivec));
1479 DES_ede3_cbc_encrypt(p,
1482 &sched[0], &sched[1], &sched[2],
1487 static krb5_error_code
1488 RSA_MD5_DES3_verify(krb5_context context,
1489 struct key_data *key,
1496 unsigned char tmp[24];
1497 unsigned char res[16];
1499 DES_key_schedule *sched = key->schedule->data;
1500 krb5_error_code ret = 0;
1502 memset(&ivec, 0, sizeof(ivec));
1503 DES_ede3_cbc_encrypt(C->checksum.data,
1506 &sched[0], &sched[1], &sched[2],
1510 MD5_Update (&md5, tmp, 8); /* confounder */
1511 MD5_Update (&md5, data, len);
1512 MD5_Final (res, &md5);
1513 if(memcmp(res, tmp + 8, sizeof(res)) != 0) {
1514 krb5_clear_error_string (context);
1515 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
1517 memset(tmp, 0, sizeof(tmp));
1518 memset(res, 0, sizeof(res));
1523 SHA1_checksum(krb5_context context,
1524 struct key_data *key,
1533 SHA1_Update(&m, data, len);
1534 SHA1_Final(C->checksum.data, &m);
1537 /* HMAC according to RFC2104 */
1538 static krb5_error_code
1539 hmac(krb5_context context,
1540 struct checksum_type *cm,
1544 struct key_data *keyblock,
1547 unsigned char *ipad, *opad;
1552 ipad = malloc(cm->blocksize + len);
1555 opad = malloc(cm->blocksize + cm->checksumsize);
1560 memset(ipad, 0x36, cm->blocksize);
1561 memset(opad, 0x5c, cm->blocksize);
1563 if(keyblock->key->keyvalue.length > cm->blocksize){
1564 (*cm->checksum)(context,
1566 keyblock->key->keyvalue.data,
1567 keyblock->key->keyvalue.length,
1570 key = result->checksum.data;
1571 key_len = result->checksum.length;
1573 key = keyblock->key->keyvalue.data;
1574 key_len = keyblock->key->keyvalue.length;
1576 for(i = 0; i < key_len; i++){
1580 memcpy(ipad + cm->blocksize, data, len);
1581 (*cm->checksum)(context, keyblock, ipad, cm->blocksize + len,
1583 memcpy(opad + cm->blocksize, result->checksum.data,
1584 result->checksum.length);
1585 (*cm->checksum)(context, keyblock, opad,
1586 cm->blocksize + cm->checksumsize, usage, result);
1587 memset(ipad, 0, cm->blocksize + len);
1589 memset(opad, 0, cm->blocksize + cm->checksumsize);
1595 krb5_error_code KRB5_LIB_FUNCTION
1596 krb5_hmac(krb5_context context,
1597 krb5_cksumtype cktype,
1604 struct checksum_type *c = _find_checksum(cktype);
1606 krb5_error_code ret;
1609 krb5_set_error_string (context, "checksum type %d not supported",
1611 return KRB5_PROG_SUMTYPE_NOSUPP;
1617 ret = hmac(context, c, data, len, usage, &kd, result);
1620 krb5_free_data(context, kd.schedule);
1626 SP_HMAC_SHA1_checksum(krb5_context context,
1627 struct key_data *key,
1633 struct checksum_type *c = _find_checksum(CKSUMTYPE_SHA1);
1636 krb5_error_code ret;
1638 res.checksum.data = sha1_data;
1639 res.checksum.length = sizeof(sha1_data);
1641 ret = hmac(context, c, data, len, usage, key, &res);
1643 krb5_abortx(context, "hmac failed");
1644 memcpy(result->checksum.data, res.checksum.data, result->checksum.length);
1648 * checksum according to section 5. of draft-brezak-win2k-krb-rc4-hmac-03.txt
1652 HMAC_MD5_checksum(krb5_context context,
1653 struct key_data *key,
1660 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1661 const char signature[] = "signaturekey";
1663 struct key_data ksign;
1666 unsigned char tmp[16];
1667 unsigned char ksign_c_data[16];
1668 krb5_error_code ret;
1670 ksign_c.checksum.length = sizeof(ksign_c_data);
1671 ksign_c.checksum.data = ksign_c_data;
1672 ret = hmac(context, c, signature, sizeof(signature), 0, key, &ksign_c);
1674 krb5_abortx(context, "hmac failed");
1676 kb.keyvalue = ksign_c.checksum;
1678 t[0] = (usage >> 0) & 0xFF;
1679 t[1] = (usage >> 8) & 0xFF;
1680 t[2] = (usage >> 16) & 0xFF;
1681 t[3] = (usage >> 24) & 0xFF;
1682 MD5_Update (&md5, t, 4);
1683 MD5_Update (&md5, data, len);
1684 MD5_Final (tmp, &md5);
1685 ret = hmac(context, c, tmp, sizeof(tmp), 0, &ksign, result);
1687 krb5_abortx(context, "hmac failed");
1691 * same as previous but being used while encrypting.
1695 HMAC_MD5_checksum_enc(krb5_context context,
1696 struct key_data *key,
1702 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
1704 struct key_data ksign;
1707 unsigned char ksign_c_data[16];
1708 krb5_error_code ret;
1710 t[0] = (usage >> 0) & 0xFF;
1711 t[1] = (usage >> 8) & 0xFF;
1712 t[2] = (usage >> 16) & 0xFF;
1713 t[3] = (usage >> 24) & 0xFF;
1715 ksign_c.checksum.length = sizeof(ksign_c_data);
1716 ksign_c.checksum.data = ksign_c_data;
1717 ret = hmac(context, c, t, sizeof(t), 0, key, &ksign_c);
1719 krb5_abortx(context, "hmac failed");
1721 kb.keyvalue = ksign_c.checksum;
1722 ret = hmac(context, c, data, len, 0, &ksign, result);
1724 krb5_abortx(context, "hmac failed");
1727 static struct checksum_type checksum_none = {
1736 static struct checksum_type checksum_crc32 = {
1745 static struct checksum_type checksum_rsa_md4 = {
1754 static struct checksum_type checksum_rsa_md4_des = {
1755 CKSUMTYPE_RSA_MD4_DES,
1759 F_KEYED | F_CPROOF | F_VARIANT,
1760 RSA_MD4_DES_checksum,
1764 static struct checksum_type checksum_des_mac = {
1772 static struct checksum_type checksum_des_mac_k = {
1773 CKSUMTYPE_DES_MAC_K,
1780 static struct checksum_type checksum_rsa_md4_des_k = {
1781 CKSUMTYPE_RSA_MD4_DES_K,
1786 RSA_MD4_DES_K_checksum,
1787 RSA_MD4_DES_K_verify
1790 static struct checksum_type checksum_rsa_md5 = {
1799 static struct checksum_type checksum_rsa_md5_des = {
1800 CKSUMTYPE_RSA_MD5_DES,
1804 F_KEYED | F_CPROOF | F_VARIANT,
1805 RSA_MD5_DES_checksum,
1808 static struct checksum_type checksum_rsa_md5_des3 = {
1809 CKSUMTYPE_RSA_MD5_DES3,
1813 F_KEYED | F_CPROOF | F_VARIANT,
1814 RSA_MD5_DES3_checksum,
1817 static struct checksum_type checksum_sha1 = {
1826 static struct checksum_type checksum_hmac_sha1_des3 = {
1827 CKSUMTYPE_HMAC_SHA1_DES3,
1831 F_KEYED | F_CPROOF | F_DERIVED,
1832 SP_HMAC_SHA1_checksum,
1836 static struct checksum_type checksum_hmac_sha1_aes128 = {
1837 CKSUMTYPE_HMAC_SHA1_96_AES_128,
1838 "hmac-sha1-96-aes128",
1841 F_KEYED | F_CPROOF | F_DERIVED,
1842 SP_HMAC_SHA1_checksum,
1846 static struct checksum_type checksum_hmac_sha1_aes256 = {
1847 CKSUMTYPE_HMAC_SHA1_96_AES_256,
1848 "hmac-sha1-96-aes256",
1851 F_KEYED | F_CPROOF | F_DERIVED,
1852 SP_HMAC_SHA1_checksum,
1856 static struct checksum_type checksum_hmac_md5 = {
1866 static struct checksum_type checksum_hmac_md5_enc = {
1867 CKSUMTYPE_HMAC_MD5_ENC,
1871 F_KEYED | F_CPROOF | F_PSEUDO,
1872 HMAC_MD5_checksum_enc,
1876 static struct checksum_type *checksum_types[] = {
1880 &checksum_rsa_md4_des,
1883 &checksum_des_mac_k,
1884 &checksum_rsa_md4_des_k,
1887 &checksum_rsa_md5_des,
1888 &checksum_rsa_md5_des3,
1890 &checksum_hmac_sha1_des3,
1891 &checksum_hmac_sha1_aes128,
1892 &checksum_hmac_sha1_aes256,
1894 &checksum_hmac_md5_enc
1897 static int num_checksums = sizeof(checksum_types) / sizeof(checksum_types[0]);
1899 static struct checksum_type *
1900 _find_checksum(krb5_cksumtype type)
1903 for(i = 0; i < num_checksums; i++)
1904 if(checksum_types[i]->type == type)
1905 return checksum_types[i];
1909 static krb5_error_code
1910 get_checksum_key(krb5_context context,
1912 unsigned usage, /* not krb5_key_usage */
1913 struct checksum_type *ct,
1914 struct key_data **key)
1916 krb5_error_code ret = 0;
1918 if(ct->flags & F_DERIVED)
1919 ret = _get_derived_key(context, crypto, usage, key);
1920 else if(ct->flags & F_VARIANT) {
1923 *key = _new_derived_key(crypto, 0xff/* KRB5_KU_RFC1510_VARIANT */);
1925 krb5_set_error_string(context, "malloc: out of memory");
1928 ret = krb5_copy_keyblock(context, crypto->key.key, &(*key)->key);
1931 for(i = 0; i < (*key)->key->keyvalue.length; i++)
1932 ((unsigned char*)(*key)->key->keyvalue.data)[i] ^= 0xF0;
1934 *key = &crypto->key;
1937 ret = _key_schedule(context, *key, crypto->params);
1941 static krb5_error_code
1942 create_checksum (krb5_context context,
1943 struct checksum_type *ct,
1950 krb5_error_code ret;
1951 struct key_data *dkey;
1954 if (ct->flags & F_DISABLED) {
1955 krb5_clear_error_string (context);
1956 return KRB5_PROG_SUMTYPE_NOSUPP;
1958 keyed_checksum = (ct->flags & F_KEYED) != 0;
1959 if(keyed_checksum && crypto == NULL) {
1960 krb5_clear_error_string (context);
1961 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
1963 if(keyed_checksum) {
1964 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
1969 result->cksumtype = ct->type;
1970 krb5_data_alloc(&result->checksum, ct->checksumsize);
1971 (*ct->checksum)(context, dkey, data, len, usage, result);
1976 arcfour_checksum_p(struct checksum_type *ct, krb5_crypto crypto)
1978 return (ct->type == CKSUMTYPE_HMAC_MD5) &&
1979 (crypto->key.key->keytype == KEYTYPE_ARCFOUR);
1982 krb5_error_code KRB5_LIB_FUNCTION
1983 krb5_create_checksum(krb5_context context,
1985 krb5_key_usage usage,
1991 struct checksum_type *ct = NULL;
1994 /* type 0 -> pick from crypto */
1996 ct = _find_checksum(type);
1997 } else if (crypto) {
1998 ct = crypto->et->keyed_checksum;
2000 ct = crypto->et->checksum;
2004 krb5_set_error_string (context, "checksum type %d not supported",
2006 return KRB5_PROG_SUMTYPE_NOSUPP;
2009 if (arcfour_checksum_p(ct, crypto)) {
2011 usage2arcfour(context, &keyusage);
2013 keyusage = CHECKSUM_USAGE(usage);
2015 return create_checksum(context, ct, crypto, keyusage,
2019 static krb5_error_code
2020 verify_checksum(krb5_context context,
2022 unsigned usage, /* not krb5_key_usage */
2027 krb5_error_code ret;
2028 struct key_data *dkey;
2031 struct checksum_type *ct;
2033 ct = _find_checksum(cksum->cksumtype);
2034 if (ct == NULL || (ct->flags & F_DISABLED)) {
2035 krb5_set_error_string (context, "checksum type %d not supported",
2037 return KRB5_PROG_SUMTYPE_NOSUPP;
2039 if(ct->checksumsize != cksum->checksum.length) {
2040 krb5_clear_error_string (context);
2041 return KRB5KRB_AP_ERR_BAD_INTEGRITY; /* XXX */
2043 keyed_checksum = (ct->flags & F_KEYED) != 0;
2044 if(keyed_checksum && crypto == NULL) {
2045 krb5_clear_error_string (context);
2046 return KRB5_PROG_SUMTYPE_NOSUPP; /* XXX */
2049 ret = get_checksum_key(context, crypto, usage, ct, &dkey);
2053 return (*ct->verify)(context, dkey, data, len, usage, cksum);
2055 ret = krb5_data_alloc (&c.checksum, ct->checksumsize);
2059 (*ct->checksum)(context, dkey, data, len, usage, &c);
2061 if(c.checksum.length != cksum->checksum.length ||
2062 memcmp(c.checksum.data, cksum->checksum.data, c.checksum.length)) {
2063 krb5_clear_error_string (context);
2064 ret = KRB5KRB_AP_ERR_BAD_INTEGRITY;
2068 krb5_data_free (&c.checksum);
2072 krb5_error_code KRB5_LIB_FUNCTION
2073 krb5_verify_checksum(krb5_context context,
2075 krb5_key_usage usage,
2080 struct checksum_type *ct;
2083 ct = _find_checksum(cksum->cksumtype);
2085 krb5_set_error_string (context, "checksum type %d not supported",
2087 return KRB5_PROG_SUMTYPE_NOSUPP;
2090 if (arcfour_checksum_p(ct, crypto)) {
2092 usage2arcfour(context, &keyusage);
2094 keyusage = CHECKSUM_USAGE(usage);
2096 return verify_checksum(context, crypto, keyusage,
2100 krb5_error_code KRB5_LIB_FUNCTION
2101 krb5_crypto_get_checksum_type(krb5_context context,
2103 krb5_cksumtype *type)
2105 struct checksum_type *ct = NULL;
2107 if (crypto != NULL) {
2108 ct = crypto->et->keyed_checksum;
2110 ct = crypto->et->checksum;
2114 krb5_set_error_string (context, "checksum type not found");
2115 return KRB5_PROG_SUMTYPE_NOSUPP;
2124 krb5_error_code KRB5_LIB_FUNCTION
2125 krb5_checksumsize(krb5_context context,
2126 krb5_cksumtype type,
2129 struct checksum_type *ct = _find_checksum(type);
2131 krb5_set_error_string (context, "checksum type %d not supported",
2133 return KRB5_PROG_SUMTYPE_NOSUPP;
2135 *size = ct->checksumsize;
2139 krb5_boolean KRB5_LIB_FUNCTION
2140 krb5_checksum_is_keyed(krb5_context context,
2141 krb5_cksumtype type)
2143 struct checksum_type *ct = _find_checksum(type);
2146 krb5_set_error_string (context, "checksum type %d not supported",
2148 return KRB5_PROG_SUMTYPE_NOSUPP;
2150 return ct->flags & F_KEYED;
2153 krb5_boolean KRB5_LIB_FUNCTION
2154 krb5_checksum_is_collision_proof(krb5_context context,
2155 krb5_cksumtype type)
2157 struct checksum_type *ct = _find_checksum(type);
2160 krb5_set_error_string (context, "checksum type %d not supported",
2162 return KRB5_PROG_SUMTYPE_NOSUPP;
2164 return ct->flags & F_CPROOF;
2167 krb5_error_code KRB5_LIB_FUNCTION
2168 krb5_checksum_disable(krb5_context context,
2169 krb5_cksumtype type)
2171 struct checksum_type *ct = _find_checksum(type);
2174 krb5_set_error_string (context, "checksum type %d not supported",
2176 return KRB5_PROG_SUMTYPE_NOSUPP;
2178 ct->flags |= F_DISABLED;
2182 /************************************************************
2184 ************************************************************/
2186 static krb5_error_code
2187 NULL_encrypt(krb5_context context,
2188 struct key_data *key,
2191 krb5_boolean encryptp,
2198 static krb5_error_code
2199 DES_CBC_encrypt_null_ivec(krb5_context context,
2200 struct key_data *key,
2203 krb5_boolean encryptp,
2208 DES_key_schedule *s = key->schedule->data;
2209 memset(&ivec, 0, sizeof(ivec));
2210 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2214 static krb5_error_code
2215 DES_CBC_encrypt_key_ivec(krb5_context context,
2216 struct key_data *key,
2219 krb5_boolean encryptp,
2224 DES_key_schedule *s = key->schedule->data;
2225 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2226 DES_cbc_encrypt(data, data, len, s, &ivec, encryptp);
2230 static krb5_error_code
2231 DES3_CBC_encrypt(krb5_context context,
2232 struct key_data *key,
2235 krb5_boolean encryptp,
2239 DES_cblock local_ivec;
2240 DES_key_schedule *s = key->schedule->data;
2243 memset(local_ivec, 0, sizeof(local_ivec));
2245 DES_ede3_cbc_encrypt(data, data, len, &s[0], &s[1], &s[2], ivec, encryptp);
2249 static krb5_error_code
2250 DES_CFB64_encrypt_null_ivec(krb5_context context,
2251 struct key_data *key,
2254 krb5_boolean encryptp,
2260 DES_key_schedule *s = key->schedule->data;
2261 memset(&ivec, 0, sizeof(ivec));
2263 DES_cfb64_encrypt(data, data, len, s, &ivec, &num, encryptp);
2267 static krb5_error_code
2268 DES_PCBC_encrypt_key_ivec(krb5_context context,
2269 struct key_data *key,
2272 krb5_boolean encryptp,
2277 DES_key_schedule *s = key->schedule->data;
2278 memcpy(&ivec, key->key->keyvalue.data, sizeof(ivec));
2280 DES_pcbc_encrypt(data, data, len, s, &ivec, encryptp);
2285 * AES draft-raeburn-krb-rijndael-krb-02
2288 void KRB5_LIB_FUNCTION
2289 _krb5_aes_cts_encrypt(const unsigned char *in, unsigned char *out,
2290 size_t len, const void *aes_key,
2291 unsigned char *ivec, const int encryptp)
2293 unsigned char tmp[AES_BLOCK_SIZE];
2294 const AES_KEY *key = aes_key; /* XXX remove this when we always have AES */
2298 * In the framework of kerberos, the length can never be shorter
2299 * then at least one blocksize.
2304 while(len > AES_BLOCK_SIZE) {
2305 for (i = 0; i < AES_BLOCK_SIZE; i++)
2306 tmp[i] = in[i] ^ ivec[i];
2307 AES_encrypt(tmp, out, key);
2308 memcpy(ivec, out, AES_BLOCK_SIZE);
2309 len -= AES_BLOCK_SIZE;
2310 in += AES_BLOCK_SIZE;
2311 out += AES_BLOCK_SIZE;
2314 for (i = 0; i < len; i++)
2315 tmp[i] = in[i] ^ ivec[i];
2316 for (; i < AES_BLOCK_SIZE; i++)
2317 tmp[i] = 0 ^ ivec[i];
2319 AES_encrypt(tmp, out - AES_BLOCK_SIZE, key);
2321 memcpy(out, ivec, len);
2322 memcpy(ivec, out - AES_BLOCK_SIZE, AES_BLOCK_SIZE);
2325 unsigned char tmp2[AES_BLOCK_SIZE];
2326 unsigned char tmp3[AES_BLOCK_SIZE];
2328 while(len > AES_BLOCK_SIZE * 2) {
2329 memcpy(tmp, in, AES_BLOCK_SIZE);
2330 AES_decrypt(in, out, key);
2331 for (i = 0; i < AES_BLOCK_SIZE; i++)
2333 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2334 len -= AES_BLOCK_SIZE;
2335 in += AES_BLOCK_SIZE;
2336 out += AES_BLOCK_SIZE;
2339 len -= AES_BLOCK_SIZE;
2341 memcpy(tmp, in, AES_BLOCK_SIZE); /* save last iv */
2342 AES_decrypt(in, tmp2, key);
2344 memcpy(tmp3, in + AES_BLOCK_SIZE, len);
2345 memcpy(tmp3 + len, tmp2 + len, AES_BLOCK_SIZE - len); /* xor 0 */
2347 for (i = 0; i < len; i++)
2348 out[i + AES_BLOCK_SIZE] = tmp2[i] ^ tmp3[i];
2350 AES_decrypt(tmp3, out, key);
2351 for (i = 0; i < AES_BLOCK_SIZE; i++)
2353 memcpy(ivec, tmp, AES_BLOCK_SIZE);
2357 static krb5_error_code
2358 AES_CTS_encrypt(krb5_context context,
2359 struct key_data *key,
2362 krb5_boolean encryptp,
2366 struct krb5_aes_schedule *aeskey = key->schedule->data;
2367 char local_ivec[AES_BLOCK_SIZE];
2375 if (len < AES_BLOCK_SIZE)
2376 krb5_abortx(context, "invalid use of AES_CTS_encrypt");
2377 if (len == AES_BLOCK_SIZE) {
2379 AES_encrypt(data, data, k);
2381 AES_decrypt(data, data, k);
2384 memset(local_ivec, 0, sizeof(local_ivec));
2387 _krb5_aes_cts_encrypt(data, data, len, k, ivec, encryptp);
2393 static krb5_error_code
2394 AES_CBC_encrypt(krb5_context context,
2395 struct key_data *key,
2398 krb5_boolean encryptp,
2402 struct krb5_aes_schedule *aeskey = key->schedule->data;
2403 char local_ivec[AES_BLOCK_SIZE];
2413 memset(local_ivec, 0, sizeof(local_ivec));
2415 AES_cbc_encrypt(data, data, len, k, ivec, encryptp);
2423 static krb5_error_code
2424 RC2_CBC_encrypt(krb5_context context,
2425 struct key_data *key,
2428 krb5_boolean encryptp,
2432 unsigned char local_ivec[8];
2433 RC2_KEY *s = key->schedule->data;
2436 memset(local_ivec, 0, sizeof(local_ivec));
2438 RC2_cbc_encrypt(data, data, len, s, ivec, encryptp);
2443 * section 6 of draft-brezak-win2k-krb-rc4-hmac-03
2445 * warning: not for small children
2448 static krb5_error_code
2449 ARCFOUR_subencrypt(krb5_context context,
2450 struct key_data *key,
2456 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2457 Checksum k1_c, k2_c, k3_c, cksum;
2462 unsigned char *cdata = data;
2463 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2464 krb5_error_code ret;
2466 t[0] = (usage >> 0) & 0xFF;
2467 t[1] = (usage >> 8) & 0xFF;
2468 t[2] = (usage >> 16) & 0xFF;
2469 t[3] = (usage >> 24) & 0xFF;
2471 k1_c.checksum.length = sizeof(k1_c_data);
2472 k1_c.checksum.data = k1_c_data;
2474 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2476 krb5_abortx(context, "hmac failed");
2478 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2480 k2_c.checksum.length = sizeof(k2_c_data);
2481 k2_c.checksum.data = k2_c_data;
2484 kb.keyvalue = k2_c.checksum;
2486 cksum.checksum.length = 16;
2487 cksum.checksum.data = data;
2489 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2491 krb5_abortx(context, "hmac failed");
2494 kb.keyvalue = k1_c.checksum;
2496 k3_c.checksum.length = sizeof(k3_c_data);
2497 k3_c.checksum.data = k3_c_data;
2499 ret = hmac(NULL, c, data, 16, 0, &ke, &k3_c);
2501 krb5_abortx(context, "hmac failed");
2503 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2504 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2505 memset (k1_c_data, 0, sizeof(k1_c_data));
2506 memset (k2_c_data, 0, sizeof(k2_c_data));
2507 memset (k3_c_data, 0, sizeof(k3_c_data));
2511 static krb5_error_code
2512 ARCFOUR_subdecrypt(krb5_context context,
2513 struct key_data *key,
2519 struct checksum_type *c = _find_checksum (CKSUMTYPE_RSA_MD5);
2520 Checksum k1_c, k2_c, k3_c, cksum;
2525 unsigned char *cdata = data;
2526 unsigned char k1_c_data[16], k2_c_data[16], k3_c_data[16];
2527 unsigned char cksum_data[16];
2528 krb5_error_code ret;
2530 t[0] = (usage >> 0) & 0xFF;
2531 t[1] = (usage >> 8) & 0xFF;
2532 t[2] = (usage >> 16) & 0xFF;
2533 t[3] = (usage >> 24) & 0xFF;
2535 k1_c.checksum.length = sizeof(k1_c_data);
2536 k1_c.checksum.data = k1_c_data;
2538 ret = hmac(NULL, c, t, sizeof(t), 0, key, &k1_c);
2540 krb5_abortx(context, "hmac failed");
2542 memcpy (k2_c_data, k1_c_data, sizeof(k1_c_data));
2544 k2_c.checksum.length = sizeof(k2_c_data);
2545 k2_c.checksum.data = k2_c_data;
2548 kb.keyvalue = k1_c.checksum;
2550 k3_c.checksum.length = sizeof(k3_c_data);
2551 k3_c.checksum.data = k3_c_data;
2553 ret = hmac(NULL, c, cdata, 16, 0, &ke, &k3_c);
2555 krb5_abortx(context, "hmac failed");
2557 RC4_set_key (&rc4_key, k3_c.checksum.length, k3_c.checksum.data);
2558 RC4 (&rc4_key, len - 16, cdata + 16, cdata + 16);
2561 kb.keyvalue = k2_c.checksum;
2563 cksum.checksum.length = 16;
2564 cksum.checksum.data = cksum_data;
2566 ret = hmac(NULL, c, cdata + 16, len - 16, 0, &ke, &cksum);
2568 krb5_abortx(context, "hmac failed");
2570 memset (k1_c_data, 0, sizeof(k1_c_data));
2571 memset (k2_c_data, 0, sizeof(k2_c_data));
2572 memset (k3_c_data, 0, sizeof(k3_c_data));
2574 if (memcmp (cksum.checksum.data, data, 16) != 0) {
2575 krb5_clear_error_string (context);
2576 return KRB5KRB_AP_ERR_BAD_INTEGRITY;
2583 * convert the usage numbers used in
2584 * draft-ietf-cat-kerb-key-derivation-00.txt to the ones in
2585 * draft-brezak-win2k-krb-rc4-hmac-04.txt
2588 static krb5_error_code
2589 usage2arcfour (krb5_context context, unsigned *usage)
2592 case KRB5_KU_AS_REP_ENC_PART : /* 3 */
2593 case KRB5_KU_TGS_REP_ENC_PART_SUB_KEY : /* 9 */
2596 case KRB5_KU_USAGE_SEAL : /* 22 */
2599 case KRB5_KU_USAGE_SIGN : /* 23 */
2602 case KRB5_KU_USAGE_SEQ: /* 24 */
2610 static krb5_error_code
2611 ARCFOUR_encrypt(krb5_context context,
2612 struct key_data *key,
2615 krb5_boolean encryptp,
2619 krb5_error_code ret;
2620 unsigned keyusage = usage;
2622 if((ret = usage2arcfour (context, &keyusage)) != 0)
2626 return ARCFOUR_subencrypt (context, key, data, len, keyusage, ivec);
2628 return ARCFOUR_subdecrypt (context, key, data, len, keyusage, ivec);
2633 * these should currently be in reverse preference order.
2634 * (only relevant for !F_PSEUDO) */
2636 static struct encryption_type enctype_null = {
2649 static struct encryption_type enctype_des_cbc_crc = {
2660 DES_CBC_encrypt_key_ivec,
2662 static struct encryption_type enctype_des_cbc_md4 = {
2671 &checksum_rsa_md4_des,
2673 DES_CBC_encrypt_null_ivec,
2675 static struct encryption_type enctype_des_cbc_md5 = {
2684 &checksum_rsa_md5_des,
2686 DES_CBC_encrypt_null_ivec,
2688 static struct encryption_type enctype_arcfour_hmac_md5 = {
2689 ETYPE_ARCFOUR_HMAC_MD5,
2701 static struct encryption_type enctype_des3_cbc_md5 = {
2710 &checksum_rsa_md5_des3,
2714 static struct encryption_type enctype_des3_cbc_sha1 = {
2715 ETYPE_DES3_CBC_SHA1,
2721 &keytype_des3_derived,
2723 &checksum_hmac_sha1_des3,
2727 static struct encryption_type enctype_old_des3_cbc_sha1 = {
2728 ETYPE_OLD_DES3_CBC_SHA1,
2729 "old-des3-cbc-sha1",
2736 &checksum_hmac_sha1_des3,
2740 static struct encryption_type enctype_aes128_cts_hmac_sha1 = {
2741 ETYPE_AES128_CTS_HMAC_SHA1_96,
2742 "aes128-cts-hmac-sha1-96",
2749 &checksum_hmac_sha1_aes128,
2753 static struct encryption_type enctype_aes256_cts_hmac_sha1 = {
2754 ETYPE_AES256_CTS_HMAC_SHA1_96,
2755 "aes256-cts-hmac-sha1-96",
2762 &checksum_hmac_sha1_aes256,
2766 static unsigned aes_128_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 2 };
2767 static heim_oid aes_128_cbc_oid = kcrypto_oid_enc(aes_128_cbc_num);
2768 static struct encryption_type enctype_aes128_cbc_none = {
2769 ETYPE_AES128_CBC_NONE,
2781 static unsigned aes_192_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 22 };
2782 static heim_oid aes_192_cbc_oid = kcrypto_oid_enc(aes_192_cbc_num);
2783 static struct encryption_type enctype_aes192_cbc_none = {
2784 ETYPE_AES192_CBC_NONE,
2796 static unsigned aes_256_cbc_num[] = { 2, 16, 840, 1, 101, 3, 4, 1, 42 };
2797 static heim_oid aes_256_cbc_oid = kcrypto_oid_enc(aes_256_cbc_num);
2798 static struct encryption_type enctype_aes256_cbc_none = {
2799 ETYPE_AES256_CBC_NONE,
2811 static struct encryption_type enctype_des_cbc_none = {
2822 DES_CBC_encrypt_null_ivec,
2824 static struct encryption_type enctype_des_cfb64_none = {
2825 ETYPE_DES_CFB64_NONE,
2835 DES_CFB64_encrypt_null_ivec,
2837 static struct encryption_type enctype_des_pcbc_none = {
2838 ETYPE_DES_PCBC_NONE,
2848 DES_PCBC_encrypt_key_ivec,
2850 static unsigned des_ede3_cbc_num[] = { 1, 2, 840, 113549, 3, 7 };
2851 static heim_oid des_ede3_cbc_oid = kcrypto_oid_enc(des_ede3_cbc_num);
2852 static struct encryption_type enctype_des3_cbc_none_cms = {
2853 ETYPE_DES3_CBC_NONE_CMS,
2854 "des3-cbc-none-cms",
2859 &keytype_des3_derived,
2865 static struct encryption_type enctype_des3_cbc_none = {
2866 ETYPE_DES3_CBC_NONE,
2872 &keytype_des3_derived,
2878 static unsigned rc2CBC_num[] = { 1, 2, 840, 113549, 3, 2 };
2879 static heim_oid rc2CBC_oid = kcrypto_oid_enc(rc2CBC_num);
2880 static struct encryption_type enctype_rc2_cbc_none = {
2894 static struct encryption_type *etypes[] = {
2896 &enctype_des_cbc_crc,
2897 &enctype_des_cbc_md4,
2898 &enctype_des_cbc_md5,
2899 &enctype_arcfour_hmac_md5,
2900 &enctype_des3_cbc_md5,
2901 &enctype_des3_cbc_sha1,
2902 &enctype_old_des3_cbc_sha1,
2903 &enctype_aes128_cts_hmac_sha1,
2904 &enctype_aes256_cts_hmac_sha1,
2905 &enctype_aes128_cbc_none,
2906 &enctype_aes192_cbc_none,
2907 &enctype_aes256_cbc_none,
2908 &enctype_des_cbc_none,
2909 &enctype_des_cfb64_none,
2910 &enctype_des_pcbc_none,
2911 &enctype_des3_cbc_none,
2912 &enctype_des3_cbc_none_cms,
2913 &enctype_rc2_cbc_none
2916 static unsigned num_etypes = sizeof(etypes) / sizeof(etypes[0]);
2919 static struct encryption_type *
2920 _find_enctype(krb5_enctype type)
2923 for(i = 0; i < num_etypes; i++)
2924 if(etypes[i]->type == type)
2930 krb5_error_code KRB5_LIB_FUNCTION
2931 krb5_enctype_to_string(krb5_context context,
2935 struct encryption_type *e;
2936 e = _find_enctype(etype);
2938 krb5_set_error_string (context, "encryption type %d not supported",
2940 return KRB5_PROG_ETYPE_NOSUPP;
2942 *string = strdup(e->name);
2943 if(*string == NULL) {
2944 krb5_set_error_string(context, "malloc: out of memory");
2950 krb5_error_code KRB5_LIB_FUNCTION
2951 krb5_string_to_enctype(krb5_context context,
2953 krb5_enctype *etype)
2956 for(i = 0; i < num_etypes; i++)
2957 if(strcasecmp(etypes[i]->name, string) == 0){
2958 *etype = etypes[i]->type;
2961 krb5_set_error_string (context, "encryption type %s not supported",
2963 return KRB5_PROG_ETYPE_NOSUPP;
2966 krb5_error_code KRB5_LIB_FUNCTION
2967 krb5_enctype_to_oid(krb5_context context,
2971 struct encryption_type *et = _find_enctype(etype);
2973 krb5_set_error_string (context, "encryption type %d not supported",
2975 return KRB5_PROG_ETYPE_NOSUPP;
2977 if(et->oid == NULL) {
2978 krb5_set_error_string (context, "%s have not oid", et->name);
2979 return KRB5_PROG_ETYPE_NOSUPP;
2981 krb5_clear_error_string(context);
2982 return copy_oid(et->oid, oid);
2985 krb5_error_code KRB5_LIB_FUNCTION
2986 _krb5_oid_to_enctype(krb5_context context,
2987 const heim_oid *oid,
2988 krb5_enctype *etype)
2991 for(i = 0; i < num_etypes; i++) {
2992 if(etypes[i]->oid && heim_oid_cmp(etypes[i]->oid, oid) == 0) {
2993 *etype = etypes[i]->type;
2997 krb5_set_error_string(context, "enctype for oid not supported");
2998 return KRB5_PROG_ETYPE_NOSUPP;
3001 krb5_error_code KRB5_LIB_FUNCTION
3002 krb5_enctype_to_keytype(krb5_context context,
3004 krb5_keytype *keytype)
3006 struct encryption_type *e = _find_enctype(etype);
3008 krb5_set_error_string (context, "encryption type %d not supported",
3010 return KRB5_PROG_ETYPE_NOSUPP;
3012 *keytype = e->keytype->type; /* XXX */
3017 krb5_error_code KRB5_LIB_FUNCTION
3018 krb5_keytype_to_enctype(krb5_context context,
3019 krb5_keytype keytype,
3020 krb5_enctype *etype)
3022 struct key_type *kt = _find_keytype(keytype);
3023 krb5_warnx(context, "krb5_keytype_to_enctype(%u)", keytype);
3025 return KRB5_PROG_KEYTYPE_NOSUPP;
3026 *etype = kt->best_etype;
3031 krb5_error_code KRB5_LIB_FUNCTION
3032 krb5_keytype_to_enctypes (krb5_context context,
3033 krb5_keytype keytype,
3041 for (i = num_etypes - 1; i >= 0; --i) {
3042 if (etypes[i]->keytype->type == keytype
3043 && !(etypes[i]->flags & F_PSEUDO))
3046 ret = malloc(n * sizeof(*ret));
3047 if (ret == NULL && n != 0) {
3048 krb5_set_error_string(context, "malloc: out of memory");
3052 for (i = num_etypes - 1; i >= 0; --i) {
3053 if (etypes[i]->keytype->type == keytype
3054 && !(etypes[i]->flags & F_PSEUDO))
3055 ret[n++] = etypes[i]->type;
3063 * First take the configured list of etypes for `keytype' if available,
3064 * else, do `krb5_keytype_to_enctypes'.
3067 krb5_error_code KRB5_LIB_FUNCTION
3068 krb5_keytype_to_enctypes_default (krb5_context context,
3069 krb5_keytype keytype,
3076 if (keytype != KEYTYPE_DES || context->etypes_des == NULL)
3077 return krb5_keytype_to_enctypes (context, keytype, len, val);
3079 for (n = 0; context->etypes_des[n]; ++n)
3081 ret = malloc (n * sizeof(*ret));
3082 if (ret == NULL && n != 0) {
3083 krb5_set_error_string(context, "malloc: out of memory");
3086 for (i = 0; i < n; ++i)
3087 ret[i] = context->etypes_des[i];
3093 krb5_error_code KRB5_LIB_FUNCTION
3094 krb5_enctype_valid(krb5_context context,
3097 struct encryption_type *e = _find_enctype(etype);
3099 krb5_set_error_string (context, "encryption type %d not supported",
3101 return KRB5_PROG_ETYPE_NOSUPP;
3103 if (e->flags & F_DISABLED) {
3104 krb5_set_error_string (context, "encryption type %s is disabled",
3106 return KRB5_PROG_ETYPE_NOSUPP;
3111 krb5_error_code KRB5_LIB_FUNCTION
3112 krb5_cksumtype_valid(krb5_context context,
3113 krb5_cksumtype ctype)
3115 struct checksum_type *c = _find_checksum(ctype);
3117 krb5_set_error_string (context, "checksum type %d not supported",
3119 return KRB5_PROG_SUMTYPE_NOSUPP;
3121 if (c->flags & F_DISABLED) {
3122 krb5_set_error_string (context, "checksum type %s is disabled",
3124 return KRB5_PROG_SUMTYPE_NOSUPP;
3130 /* if two enctypes have compatible keys */
3131 krb5_boolean KRB5_LIB_FUNCTION
3132 krb5_enctypes_compatible_keys(krb5_context context,
3133 krb5_enctype etype1,
3134 krb5_enctype etype2)
3136 struct encryption_type *e1 = _find_enctype(etype1);
3137 struct encryption_type *e2 = _find_enctype(etype2);
3138 return e1 != NULL && e2 != NULL && e1->keytype == e2->keytype;
3142 derived_crypto(krb5_context context,
3145 return (crypto->et->flags & F_DERIVED) != 0;
3149 special_crypto(krb5_context context,
3152 return (crypto->et->flags & F_SPECIAL) != 0;
3155 #define CHECKSUMSIZE(C) ((C)->checksumsize)
3156 #define CHECKSUMTYPE(C) ((C)->type)
3158 static krb5_error_code
3159 encrypt_internal_derived(krb5_context context,
3167 size_t sz, block_sz, checksum_sz, total_sz;
3169 unsigned char *p, *q;
3170 krb5_error_code ret;
3171 struct key_data *dkey;
3172 const struct encryption_type *et = crypto->et;
3174 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3176 sz = et->confoundersize + len;
3177 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3178 total_sz = block_sz + checksum_sz;
3179 p = calloc(1, total_sz);
3181 krb5_set_error_string(context, "malloc: out of memory");
3186 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3187 q += et->confoundersize;
3188 memcpy(q, data, len);
3190 ret = create_checksum(context,
3193 INTEGRITY_USAGE(usage),
3197 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3198 free_Checksum (&cksum);
3199 krb5_clear_error_string (context);
3200 ret = KRB5_CRYPTO_INTERNAL;
3204 memcpy(p + block_sz, cksum.checksum.data, cksum.checksum.length);
3205 free_Checksum (&cksum);
3206 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3209 ret = _key_schedule(context, dkey, crypto->params);
3213 krb5_crypto_debug(context, 1, block_sz, dkey->key);
3215 ret = (*et->encrypt)(context, dkey, p, block_sz, 1, usage, ivec);
3219 result->length = total_sz;
3222 memset(p, 0, total_sz);
3228 static krb5_error_code
3229 encrypt_internal(krb5_context context,
3236 size_t sz, block_sz, checksum_sz, padsize = 0;
3238 unsigned char *p, *q;
3239 krb5_error_code ret;
3240 const struct encryption_type *et = crypto->et;
3242 checksum_sz = CHECKSUMSIZE(et->checksum);
3244 sz = et->confoundersize + checksum_sz + len;
3245 block_sz = (sz + et->padsize - 1) &~ (et->padsize - 1); /* pad */
3246 if ((et->flags & F_PADCMS) && et->padsize != 1) {
3247 padsize = et->padsize - (sz % et->padsize);
3248 if (padsize == et->padsize)
3249 block_sz += et->padsize;
3251 p = calloc(1, block_sz);
3253 krb5_set_error_string(context, "malloc: out of memory");
3258 krb5_generate_random_block(q, et->confoundersize); /* XXX */
3259 q += et->confoundersize;
3260 memset(q, 0, checksum_sz);
3262 memcpy(q, data, len);
3264 ret = create_checksum(context,
3271 if(ret == 0 && cksum.checksum.length != checksum_sz) {
3272 krb5_clear_error_string (context);
3273 free_Checksum(&cksum);
3274 ret = KRB5_CRYPTO_INTERNAL;
3278 memcpy(p + et->confoundersize, cksum.checksum.data, cksum.checksum.length);
3279 free_Checksum(&cksum);
3280 ret = _key_schedule(context, &crypto->key, crypto->params);
3283 if (et->flags & F_PADCMS) {
3285 q = p + len + checksum_sz + et->confoundersize;
3286 for (i = 0; i < padsize; i++)
3290 krb5_crypto_debug(context, 1, block_sz, crypto->key.key);
3292 ret = (*et->encrypt)(context, &crypto->key, p, block_sz, 1, 0, ivec);
3294 memset(p, 0, block_sz);
3299 result->length = block_sz;
3302 memset(p, 0, block_sz);
3307 static krb5_error_code
3308 encrypt_internal_special(krb5_context context,
3316 struct encryption_type *et = crypto->et;
3317 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3318 size_t sz = len + cksum_sz + et->confoundersize;
3320 krb5_error_code ret;
3324 krb5_set_error_string(context, "malloc: out of memory");
3328 memset (p, 0, cksum_sz);
3330 krb5_generate_random_block(p, et->confoundersize);
3331 p += et->confoundersize;
3332 memcpy (p, data, len);
3333 ret = (*et->encrypt)(context, &crypto->key, tmp, sz, TRUE, usage, ivec);
3340 result->length = sz;
3344 static krb5_error_code
3345 decrypt_internal_derived(krb5_context context,
3356 krb5_error_code ret;
3357 struct key_data *dkey;
3358 struct encryption_type *et = crypto->et;
3361 checksum_sz = CHECKSUMSIZE(et->keyed_checksum);
3362 if (len < checksum_sz) {
3363 krb5_clear_error_string (context);
3364 return EINVAL; /* XXX - better error code? */
3367 if (((len - checksum_sz) % et->padsize) != 0) {
3368 krb5_clear_error_string(context);
3369 return KRB5_BAD_MSIZE;
3373 if(len != 0 && p == NULL) {
3374 krb5_set_error_string(context, "malloc: out of memory");
3377 memcpy(p, data, len);
3381 ret = _get_derived_key(context, crypto, ENCRYPTION_USAGE(usage), &dkey);
3386 ret = _key_schedule(context, dkey, crypto->params);
3392 krb5_crypto_debug(context, 0, len, dkey->key);
3394 ret = (*et->encrypt)(context, dkey, p, len, 0, usage, ivec);
3400 cksum.checksum.data = p + len;
3401 cksum.checksum.length = checksum_sz;
3402 cksum.cksumtype = CHECKSUMTYPE(et->keyed_checksum);
3404 ret = verify_checksum(context,
3406 INTEGRITY_USAGE(usage),
3414 l = len - et->confoundersize;
3415 memmove(p, p + et->confoundersize, l);
3416 result->data = realloc(p, l);
3417 if(result->data == NULL) {
3419 krb5_set_error_string(context, "malloc: out of memory");
3426 static krb5_error_code
3427 decrypt_internal(krb5_context context,
3434 krb5_error_code ret;
3437 size_t checksum_sz, l;
3438 struct encryption_type *et = crypto->et;
3440 if ((len % et->padsize) != 0) {
3441 krb5_clear_error_string(context);
3442 return KRB5_BAD_MSIZE;
3445 checksum_sz = CHECKSUMSIZE(et->checksum);
3447 if(len != 0 && p == NULL) {
3448 krb5_set_error_string(context, "malloc: out of memory");
3451 memcpy(p, data, len);
3453 ret = _key_schedule(context, &crypto->key, crypto->params);
3459 krb5_crypto_debug(context, 0, len, crypto->key.key);
3461 ret = (*et->encrypt)(context, &crypto->key, p, len, 0, 0, ivec);
3466 ret = krb5_data_copy(&cksum.checksum, p + et->confoundersize, checksum_sz);
3471 memset(p + et->confoundersize, 0, checksum_sz);
3472 cksum.cksumtype = CHECKSUMTYPE(et->checksum);
3473 ret = verify_checksum(context, NULL, 0, p, len, &cksum);
3474 free_Checksum(&cksum);
3479 l = len - et->confoundersize - checksum_sz;
3480 memmove(p, p + et->confoundersize + checksum_sz, l);
3481 result->data = realloc(p, l);
3482 if(result->data == NULL) {
3484 krb5_set_error_string(context, "malloc: out of memory");
3491 static krb5_error_code
3492 decrypt_internal_special(krb5_context context,
3500 struct encryption_type *et = crypto->et;
3501 size_t cksum_sz = CHECKSUMSIZE(et->checksum);
3502 size_t sz = len - cksum_sz - et->confoundersize;
3504 krb5_error_code ret;
3506 if ((len % et->padsize) != 0) {
3507 krb5_clear_error_string(context);
3508 return KRB5_BAD_MSIZE;
3513 krb5_set_error_string(context, "malloc: out of memory");
3516 memcpy(p, data, len);
3518 ret = (*et->encrypt)(context, &crypto->key, p, len, FALSE, usage, ivec);
3524 memmove (p, p + cksum_sz + et->confoundersize, sz);
3525 result->data = realloc(p, sz);
3526 if(result->data == NULL) {
3528 krb5_set_error_string(context, "malloc: out of memory");
3531 result->length = sz;
3536 krb5_error_code KRB5_LIB_FUNCTION
3537 krb5_encrypt_ivec(krb5_context context,
3545 if(derived_crypto(context, crypto))
3546 return encrypt_internal_derived(context, crypto, usage,
3547 data, len, result, ivec);
3548 else if (special_crypto(context, crypto))
3549 return encrypt_internal_special (context, crypto, usage,
3550 data, len, result, ivec);
3552 return encrypt_internal(context, crypto, data, len, result, ivec);
3555 krb5_error_code KRB5_LIB_FUNCTION
3556 krb5_encrypt(krb5_context context,
3563 return krb5_encrypt_ivec(context, crypto, usage, data, len, result, NULL);
3566 krb5_error_code KRB5_LIB_FUNCTION
3567 krb5_encrypt_EncryptedData(krb5_context context,
3573 EncryptedData *result)
3575 result->etype = CRYPTO_ETYPE(crypto);
3577 ALLOC(result->kvno, 1);
3578 *result->kvno = kvno;
3580 result->kvno = NULL;
3581 return krb5_encrypt(context, crypto, usage, data, len, &result->cipher);
3584 krb5_error_code KRB5_LIB_FUNCTION
3585 krb5_decrypt_ivec(krb5_context context,
3593 if(derived_crypto(context, crypto))
3594 return decrypt_internal_derived(context, crypto, usage,
3595 data, len, result, ivec);
3596 else if (special_crypto (context, crypto))
3597 return decrypt_internal_special(context, crypto, usage,
3598 data, len, result, ivec);
3600 return decrypt_internal(context, crypto, data, len, result, ivec);
3603 krb5_error_code KRB5_LIB_FUNCTION
3604 krb5_decrypt(krb5_context context,
3611 return krb5_decrypt_ivec (context, crypto, usage, data, len, result,
3615 krb5_error_code KRB5_LIB_FUNCTION
3616 krb5_decrypt_EncryptedData(krb5_context context,
3619 const EncryptedData *e,
3622 return krb5_decrypt(context, crypto, usage,
3623 e->cipher.data, e->cipher.length, result);
3626 /************************************************************
3628 ************************************************************/
3631 #include <openssl/rand.h>
3633 /* From openssl/crypto/rand/rand_lcl.h */
3634 #define ENTROPY_NEEDED 20
3636 seed_something(void)
3638 char buf[1024], seedfile[256];
3640 /* If there is a seed file, load it. But such a file cannot be trusted,
3641 so use 0 for the entropy estimate */
3642 if (RAND_file_name(seedfile, sizeof(seedfile))) {
3644 fd = open(seedfile, O_RDONLY);
3647 ret = read(fd, buf, sizeof(buf));
3649 RAND_add(buf, ret, 0.0);
3656 /* Calling RAND_status() will try to use /dev/urandom if it exists so
3657 we do not have to deal with it. */
3658 if (RAND_status() != 1) {
3659 krb5_context context;
3663 if (!krb5_init_context(&context)) {
3664 p = krb5_config_get_string(context, NULL, "libdefaults",
3665 "egd_socket", NULL);
3667 RAND_egd_bytes(p, ENTROPY_NEEDED);
3668 krb5_free_context(context);
3672 if (RAND_status() == 1) {
3673 /* Update the seed file */
3675 RAND_write_file(seedfile);
3682 void KRB5_LIB_FUNCTION
3683 krb5_generate_random_block(void *buf, size_t len)
3685 static int rng_initialized = 0;
3687 HEIMDAL_MUTEX_lock(&crypto_mutex);
3688 if (!rng_initialized) {
3689 if (seed_something())
3690 krb5_abortx(NULL, "Fatal: could not seed the random number generator");
3692 rng_initialized = 1;
3694 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3695 if (RAND_bytes(buf, len) != 1)
3696 krb5_abortx(NULL, "Failed to generate random block");
3701 void KRB5_LIB_FUNCTION
3702 krb5_generate_random_block(void *buf, size_t len)
3704 DES_cblock key, out;
3705 static DES_cblock counter;
3706 static DES_key_schedule schedule;
3708 static int initialized = 0;
3710 HEIMDAL_MUTEX_lock(&crypto_mutex);
3712 DES_new_random_key(&key);
3713 DES_set_key(&key, &schedule);
3714 memset(&key, 0, sizeof(key));
3715 DES_new_random_key(&counter);
3718 HEIMDAL_MUTEX_unlock(&crypto_mutex);
3720 DES_ecb_encrypt(&counter, &out, &schedule, DES_ENCRYPT);
3721 for(i = 7; i >=0; i--)
3724 memcpy(buf, out, min(len, sizeof(out)));
3725 len -= min(len, sizeof(out));
3726 buf = (char*)buf + sizeof(out);
3732 DES3_postproc(krb5_context context,
3733 unsigned char *k, size_t len, struct key_data *key)
3735 DES3_random_to_key(context, key->key, k, len);
3737 if (key->schedule) {
3738 krb5_free_data(context, key->schedule);
3739 key->schedule = NULL;
3743 static krb5_error_code
3744 derive_key(krb5_context context,
3745 struct encryption_type *et,
3746 struct key_data *key,
3747 const void *constant,
3751 unsigned int nblocks = 0, i;
3752 krb5_error_code ret = 0;
3754 struct key_type *kt = et->keytype;
3755 /* since RC2 is only the weird crypto alg with parameter and this
3756 * function not defined with work with RC2, this is ok */
3757 ret = _key_schedule(context, key, NULL);
3760 if(et->blocksize * 8 < kt->bits ||
3761 len != et->blocksize) {
3762 nblocks = (kt->bits + et->blocksize * 8 - 1) / (et->blocksize * 8);
3763 k = malloc(nblocks * et->blocksize);
3765 krb5_set_error_string(context, "malloc: out of memory");
3768 _krb5_n_fold(constant, len, k, et->blocksize);
3769 for(i = 0; i < nblocks; i++) {
3771 memcpy(k + i * et->blocksize,
3772 k + (i - 1) * et->blocksize,
3774 (*et->encrypt)(context, key, k + i * et->blocksize, et->blocksize,
3778 /* this case is probably broken, but won't be run anyway */
3779 void *c = malloc(len);
3780 size_t res_len = (kt->bits + 7) / 8;
3782 if(len != 0 && c == NULL) {
3783 krb5_set_error_string(context, "malloc: out of memory");
3786 memcpy(c, constant, len);
3787 (*et->encrypt)(context, key, c, len, 1, 0, NULL);
3788 k = malloc(res_len);
3789 if(res_len != 0 && k == NULL) {
3791 krb5_set_error_string(context, "malloc: out of memory");
3794 _krb5_n_fold(c, len, k, res_len);
3798 /* XXX keytype dependent post-processing */
3801 DES3_postproc(context, k, nblocks * et->blocksize, key);
3803 case KEYTYPE_AES128:
3804 case KEYTYPE_AES256:
3805 memcpy(key->key->keyvalue.data, k, key->key->keyvalue.length);
3808 krb5_set_error_string(context,
3809 "derive_key() called with unknown keytype (%u)",
3811 ret = KRB5_CRYPTO_INTERNAL;
3814 if (key->schedule) {
3815 krb5_free_data(context, key->schedule);
3816 key->schedule = NULL;
3818 memset(k, 0, nblocks * et->blocksize);
3823 static struct key_data *
3824 _new_derived_key(krb5_crypto crypto, unsigned usage)
3826 struct key_usage *d = crypto->key_usage;
3827 d = realloc(d, (crypto->num_key_usage + 1) * sizeof(*d));
3830 crypto->key_usage = d;
3831 d += crypto->num_key_usage++;
3832 memset(d, 0, sizeof(*d));
3837 krb5_error_code KRB5_LIB_FUNCTION
3838 krb5_derive_key(krb5_context context,
3839 const krb5_keyblock *key,
3841 const void *constant,
3842 size_t constant_len,
3843 krb5_keyblock **derived_key)
3845 krb5_error_code ret;
3846 struct encryption_type *et;
3849 *derived_key = NULL;
3851 et = _find_enctype (etype);
3853 krb5_set_error_string(context, "encryption type %d not supported",
3855 return KRB5_PROG_ETYPE_NOSUPP;
3858 ret = krb5_copy_keyblock(context, key, &d.key);
3863 ret = derive_key(context, et, &d, constant, constant_len);
3865 ret = krb5_copy_keyblock(context, d.key, derived_key);
3866 free_key_data(context, &d);
3870 static krb5_error_code
3871 _get_derived_key(krb5_context context,
3874 struct key_data **key)
3878 unsigned char constant[5];
3880 for(i = 0; i < crypto->num_key_usage; i++)
3881 if(crypto->key_usage[i].usage == usage) {
3882 *key = &crypto->key_usage[i].key;
3885 d = _new_derived_key(crypto, usage);
3887 krb5_set_error_string(context, "malloc: out of memory");
3890 krb5_copy_keyblock(context, crypto->key.key, &d->key);
3891 _krb5_put_int(constant, usage, 5);
3892 derive_key(context, crypto->et, d, constant, sizeof(constant));
3898 krb5_error_code KRB5_LIB_FUNCTION
3899 krb5_crypto_init(krb5_context context,
3900 const krb5_keyblock *key,
3902 krb5_crypto *crypto)
3904 krb5_error_code ret;
3906 if(*crypto == NULL) {
3907 krb5_set_error_string(context, "malloc: out of memory");
3910 if(etype == ETYPE_NULL)
3911 etype = key->keytype;
3912 (*crypto)->et = _find_enctype(etype);
3913 if((*crypto)->et == NULL || ((*crypto)->et->flags & F_DISABLED)) {
3916 krb5_set_error_string (context, "encryption type %d not supported",
3918 return KRB5_PROG_ETYPE_NOSUPP;
3920 if((*crypto)->et->keytype->minsize > key->keyvalue.length) {
3923 krb5_set_error_string (context, "encryption key has bad length");
3924 return KRB5_BAD_KEYSIZE;
3926 ret = krb5_copy_keyblock(context, key, &(*crypto)->key.key);
3932 (*crypto)->key.schedule = NULL;
3933 (*crypto)->num_key_usage = 0;
3934 (*crypto)->key_usage = NULL;
3935 (*crypto)->params = NULL;
3940 free_key_data(krb5_context context, struct key_data *key)
3942 krb5_free_keyblock(context, key->key);
3944 memset(key->schedule->data, 0, key->schedule->length);
3945 krb5_free_data(context, key->schedule);
3950 free_key_usage(krb5_context context, struct key_usage *ku)
3952 free_key_data(context, &ku->key);
3955 krb5_error_code KRB5_LIB_FUNCTION
3956 krb5_crypto_destroy(krb5_context context,
3961 for(i = 0; i < crypto->num_key_usage; i++)
3962 free_key_usage(context, &crypto->key_usage[i]);
3963 free(crypto->key_usage);
3964 free_key_data(context, &crypto->key);
3965 free(crypto->params);
3970 krb5_error_code KRB5_LIB_FUNCTION
3971 krb5_crypto_get_params(krb5_context context,
3972 const krb5_crypto crypto,
3973 const krb5_data *params,
3976 krb5_error_code (*gp)(krb5_context, const krb5_data *,void **,krb5_data *);
3977 krb5_error_code ret;
3979 gp = crypto->et->keytype->get_params;
3981 if (crypto->params) {
3982 krb5_set_error_string(context,
3983 "krb5_crypto_get_params called "
3985 return KRB5_PROG_ETYPE_NOSUPP;
3987 ret = (*gp)(context, params, &crypto->params, ivec);
3992 ret = decode_CBCParameter(params->data, params->length, ivec, &size);
3996 if (ivec->length < crypto->et->blocksize) {
3997 krb5_data_free(ivec);
3998 krb5_set_error_string(context, "%s IV of wrong size",
4000 return ASN1_PARSE_ERROR;
4005 krb5_error_code KRB5_LIB_FUNCTION
4006 krb5_crypto_set_params(krb5_context context,
4007 const krb5_crypto crypto,
4008 const krb5_data *ivec,
4011 krb5_error_code (*sp)(krb5_context, const void *,
4012 const krb5_data *, krb5_data *);
4013 krb5_error_code ret;
4015 sp = crypto->et->keytype->set_params;
4020 ASN1_MALLOC_ENCODE(CBCParameter, params->data, params->length,
4024 if (size != params->length)
4025 krb5_abortx(context, "Internal asn1 encoder failure");
4028 if (crypto->params) {
4029 krb5_set_error_string(context,
4030 "krb5_crypto_set_params called "
4032 return KRB5_PROG_ETYPE_NOSUPP;
4034 return (*sp)(context, crypto->params, ivec, params);
4038 krb5_error_code KRB5_LIB_FUNCTION
4039 krb5_crypto_getblocksize(krb5_context context,
4043 *blocksize = crypto->et->blocksize;
4047 krb5_error_code KRB5_LIB_FUNCTION
4048 krb5_crypto_getenctype(krb5_context context,
4050 krb5_enctype *enctype)
4052 *enctype = crypto->et->type;
4056 krb5_error_code KRB5_LIB_FUNCTION
4057 krb5_crypto_getpadsize(krb5_context context,
4061 *padsize = crypto->et->padsize;
4065 krb5_error_code KRB5_LIB_FUNCTION
4066 krb5_crypto_getconfoundersize(krb5_context context,
4068 size_t *confoundersize)
4070 *confoundersize = crypto->et->confoundersize;
4074 krb5_error_code KRB5_LIB_FUNCTION
4075 krb5_enctype_disable(krb5_context context,
4076 krb5_enctype enctype)
4078 struct encryption_type *et = _find_enctype(enctype);
4081 krb5_set_error_string (context, "encryption type %d not supported",
4083 return KRB5_PROG_ETYPE_NOSUPP;
4085 et->flags |= F_DISABLED;
4089 krb5_error_code KRB5_LIB_FUNCTION
4090 krb5_string_to_key_derived(krb5_context context,
4096 struct encryption_type *et = _find_enctype(etype);
4097 krb5_error_code ret;
4099 size_t keylen = et->keytype->bits / 8;
4103 krb5_set_error_string (context, "encryption type %d not supported",
4105 return KRB5_PROG_ETYPE_NOSUPP;
4108 if(kd.key == NULL) {
4109 krb5_set_error_string (context, "malloc: out of memory");
4112 ret = krb5_data_alloc(&kd.key->keyvalue, et->keytype->size);
4117 kd.key->keytype = etype;
4118 tmp = malloc (keylen);
4120 krb5_free_keyblock(context, kd.key);
4121 krb5_set_error_string (context, "malloc: out of memory");
4124 _krb5_n_fold(str, len, tmp, keylen);
4126 DES3_postproc (context, tmp, keylen, &kd); /* XXX */
4127 memset(tmp, 0, keylen);
4129 ret = derive_key(context,
4132 "kerberos", /* XXX well known constant */
4133 strlen("kerberos"));
4134 ret = krb5_copy_keyblock_contents(context, kd.key, key);
4135 free_key_data(context, &kd);
4140 wrapped_length (krb5_context context,
4144 struct encryption_type *et = crypto->et;
4145 size_t padsize = et->padsize;
4146 size_t checksumsize = CHECKSUMSIZE(et->checksum);
4149 res = et->confoundersize + checksumsize + data_len;
4150 res = (res + padsize - 1) / padsize * padsize;
4155 wrapped_length_dervied (krb5_context context,
4159 struct encryption_type *et = crypto->et;
4160 size_t padsize = et->padsize;
4163 res = et->confoundersize + data_len;
4164 res = (res + padsize - 1) / padsize * padsize;
4165 if (et->keyed_checksum)
4166 res += et->keyed_checksum->checksumsize;
4168 res += et->checksum->checksumsize;
4173 * Return the size of an encrypted packet of length `data_len'
4177 krb5_get_wrapped_length (krb5_context context,
4181 if (derived_crypto (context, crypto))
4182 return wrapped_length_dervied (context, crypto, data_len);
4184 return wrapped_length (context, crypto, data_len);
4187 krb5_error_code KRB5_LIB_FUNCTION
4188 krb5_random_to_key(krb5_context context,
4194 krb5_error_code ret;
4195 struct encryption_type *et = _find_enctype(type);
4197 krb5_set_error_string(context, "encryption type %d not supported",
4199 return KRB5_PROG_ETYPE_NOSUPP;
4201 if ((et->keytype->bits + 7) / 8 > size) {
4202 krb5_set_error_string(context, "encryption key %s needs %d bytes "
4203 "of random to make an encryption key out of it",
4204 et->name, (int)et->keytype->size);
4205 return KRB5_PROG_ETYPE_NOSUPP;
4207 ret = krb5_data_alloc(&key->keyvalue, et->keytype->size);
4210 key->keytype = type;
4211 if (et->keytype->random_to_key)
4212 (*et->keytype->random_to_key)(context, key, data, size);
4214 memcpy(key->keyvalue.data, data, et->keytype->size);
4220 _krb5_pk_octetstring2key(krb5_context context,
4224 const heim_octet_string *c_n,
4225 const heim_octet_string *k_n,
4228 struct encryption_type *et = _find_enctype(type);
4229 krb5_error_code ret;
4230 size_t keylen, offset;
4232 unsigned char counter;
4233 unsigned char shaoutput[20];
4236 krb5_set_error_string(context, "encryption type %d not supported",
4238 return KRB5_PROG_ETYPE_NOSUPP;
4240 keylen = (et->keytype->bits + 7) / 8;
4242 keydata = malloc(keylen);
4243 if (keydata == NULL) {
4244 krb5_set_error_string(context, "malloc: out of memory");
4254 SHA1_Update(&m, &counter, 1);
4255 SHA1_Update(&m, dhdata, dhsize);
4257 SHA1_Update(&m, c_n->data, c_n->length);
4259 SHA1_Update(&m, k_n->data, k_n->length);
4260 SHA1_Final(shaoutput, &m);
4262 memcpy((unsigned char *)keydata + offset,
4264 min(keylen - offset, sizeof(shaoutput)));
4266 offset += sizeof(shaoutput);
4268 } while(offset < keylen);
4269 memset(shaoutput, 0, sizeof(shaoutput));
4271 ret = krb5_random_to_key(context, type, keydata, keylen, key);
4272 memset(keydata, 0, sizeof(keylen));
4280 static krb5_error_code
4281 krb5_get_keyid(krb5_context context,
4286 unsigned char tmp[16];
4289 MD5_Update (&md5, key->keyvalue.data, key->keyvalue.length);
4290 MD5_Final (tmp, &md5);
4291 *keyid = (tmp[12] << 24) | (tmp[13] << 16) | (tmp[14] << 8) | tmp[15];
4296 krb5_crypto_debug(krb5_context context,
4303 krb5_get_keyid(context, key, &keyid);
4304 krb5_enctype_to_string(context, key->keytype, &kt);
4305 krb5_warnx(context, "%s %lu bytes with key-id %#x (%s)",
4306 encryptp ? "encrypting" : "decrypting",
4313 #endif /* CRYPTO_DEBUG */
4321 krb5_context context;
4326 unsigned usage = ENCRYPTION_USAGE(3);
4327 krb5_error_code ret;
4329 ret = krb5_init_context(&context);
4331 errx (1, "krb5_init_context failed: %d", ret);
4333 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4334 key.keyvalue.data = "\xb3\x85\x58\x94\xd9\xdc\x7c\xc8"
4335 "\x25\xe9\x85\xab\x3e\xb5\xfb\x0e"
4336 "\xc8\xdf\xab\x26\x86\x64\x15\x25";
4337 key.keyvalue.length = 24;
4339 krb5_crypto_init(context, &key, 0, &crypto);
4341 d = _new_derived_key(crypto, usage);
4344 krb5_copy_keyblock(context, crypto->key.key, &d->key);
4345 _krb5_put_int(constant, usage, 4);
4346 derive_key(context, crypto->et, d, constant, sizeof(constant));
4350 krb5_context context;
4354 krb5_error_code ret;
4357 char *data = "what do ya want for nothing?";
4359 ret = krb5_init_context(&context);
4361 errx (1, "krb5_init_context failed: %d", ret);
4363 key.keytype = ETYPE_NEW_DES3_CBC_SHA1;
4364 key.keyvalue.data = "Jefe";
4365 /* "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"
4366 "\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b\x0b"; */
4367 key.keyvalue.length = 4;
4369 d = calloc(1, sizeof(*d));
4372 res.checksum.length = 20;
4373 res.checksum.data = malloc(res.checksum.length);
4374 SP_HMAC_SHA1_checksum(context, d, data, 28, &res);